<template>
  <pui-popper theme="light" @onClose="clickOutsideHandle" @onOpen="toggleOpen" :placement="placement" :disabled="disabled">
    <div class="color-button" :style="`background-color: ${colorObj.hex8}`"></div>
    <template #popper>
      <div class="pui-color-picker">
        <div class="saturation-value" ref="saturation_valueRef" @mousedown="mousedownSV">
          <div :style="`background-color: hsl(${hue}, 100%, 50%);`">
            <div class="point" :style="pointStyle"></div>
          </div>
          <div class="saturation-value-2"></div>
          <div class="saturation-value-3"></div>
        </div>
        <div class="color-select-middle">
          <div style="flex: auto">
            <div class="hue-slider" ref="hue_sliderRef" @mousedown="mousedownHue">
              <div class="slider" :style="hueSliderStyle"></div>
            </div>
            <div class="alpha-slider" ref="alpha_sliderRef" @mousedown="mousedownAlpha">
              <div class="slider" :style="alphaSliderStyle"></div>
              <div :style="`background: linear-gradient(to right, rgba(0,0,0,0), ${colorObj.rgb});width: 100%;height: 100%`"></div>
            </div>
          </div>
          <div class="color-diamond">
            <div
              :style="`background-color: ${colorObj.rgba};width: 100%;height: 100%;box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .15), inset 0 0 4px rgba(0, 0, 0, .25);`"
            ></div>
          </div>
        </div>
        <div class="color-value">
          <div class="hex">
            <label>
              <input :value="colorObj.hex8" @input="hexChange" spellcheck="false" />
            </label>
            <p>Hex</p>
          </div>
          <div class="rgba-r">
            <label>
              <input :value="red" @input="redChange" />
            </label>
            <p>R</p>
          </div>
          <div class="rgba-g">
            <label>
              <input :value="green" @input="greenChange" />
            </label>
            <p>G</p>
          </div>
          <div class="rgba-b">
            <label>
              <input :value="blue" @input="blueChange" />
            </label>
            <p>B</p>
          </div>
          <div class="rgba-a">
            <label>
              <input :value="alpha" @input="alphaChange" />
            </label>
            <p>A</p>
          </div>
        </div>
        <ul class="preset">
          <li v-for="(item, i) in preset" :key="i" :style="`background-color: ${item}`" @click="presetChange(item)"></li>
        </ul>
      </div>
    </template>
  </pui-popper>
</template>

<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
  name: 'pui-color-picker',
});
</script>

<script setup lang="ts">
import { ref, computed, watch, onMounted } from 'vue';

import type { Color, Props } from './interface';

const props = withDefaults(defineProps<Props>(), {
  placement: 'bottom',
  disabled: false,
  color: () => {
    return { r: 252, g: 5, b: 34, a: 1 };
  },
  preset: () => {
    return [
      '#FC0522',
      '#F5A623',
      '#F8E71C',
      '#8B572A',
      '#7ED321',
      '#417505',
      '#BD10E0',
      '#9013FE',
      '#4A90E2',
      '#409EFF',
      '#50E3C2',
      '#B8E986',
      '#000000',
      '#4A4A4A',
      '#9B9B9B',
      '#FFFFFF',
    ];
  },
});

const emits = defineEmits<{
  'update:color': [val: Color];
  changeColor: [val: string];
}>();

const saturation_valueRef = ref();
const hue_sliderRef = ref();
const alpha_sliderRef = ref();

const pointStyle = ref('top: 25%;left: 80%;');
const hueSliderStyle = ref('left: 0;');
const alphaSliderStyle = ref('left: calc(100% - 6px);');

const hue = ref(0);
const saturation = ref(1);
const value = ref(1);

const red = ref(255);
const green = ref(0);
const blue = ref(0);

const alpha = ref(1);

const colorObj = computed(() => {
  let r = red.value;
  let g = green.value;
  let b = blue.value;
  let a = alpha.value;
  let h = hue.value;
  let s = saturation.value;
  let v = value.value;
  return {
    rgb: `rgba(${r},${g},${b})`,
    rgba: `rgba(${r},${g},${b},${a})`,
    hex6: rgba2hex(r, g, b),
    hex8: rgba2hex(r, g, b, a),
    hsv: `hsv(${h},${s},${v})`,
    hsl: ``,
  };
});

watch(alpha, () => {
  emits('update:color', {
    r: red.value,
    g: green.value,
    b: blue.value,
    a: alpha.value,
  });
  emits('changeColor', colorObj.value.hex8);
  // 移动透明度滑块
  alphaSliderStyle.value = `left: ${alpha.value >= 1 ? 'calc(100% - 6px)' : alpha.value * 100 + '%'};`;
});
watch([red, green, blue], (newValue) => {
  emits('update:color', {
    r: red.value,
    g: green.value,
    b: blue.value,
    a: alpha.value,
  });
  emits('changeColor', colorObj.value.hex8);

  let { h, s, v } = rgb2hsv(red.value, green.value, blue.value);

  hue.value = h;
  saturation.value = s;
  value.value = v;

  // 移动背景板圆圈
  pointStyle.value = `top: ${100 - v * 100}%;left: ${s * 100}%;`;
  // 移动色调滑块
  hueSliderStyle.value = `left: ${(hue.value / 360) * 100}%;`;
});

const rgba2hex = (r: any, g: any, b: any, a = 1) => {
  r = parseInt(r);
  let r1 = r.toString(16).length !== 2 ? '0' + r.toString(16) : r.toString(16);
  g = parseInt(g);
  let g1 = g.toString(16).length !== 2 ? '0' + g.toString(16) : g.toString(16);
  b = parseInt(b);
  let b1 = b.toString(16).length !== 2 ? '0' + b.toString(16) : b.toString(16);
  a = parseFloat(a.toString());
  let a1 = '';
  if (a !== 1) {
    let temp = Math.floor(256 * a);
    a1 = temp.toString(16).length !== 2 ? '0' + temp.toString(16) : temp.toString(16);
  }
  return `#${r1}${g1}${b1}${a1}`.toUpperCase();
};

const hex2rgba: any = (s: any) => {
  if (/^#?[0-9a-fA-F]{3}$/.test(s)) {
    let b = s.substring(s.length - 1, s.length);
    let g = s.substring(s.length - 2, s.length - 1);
    let r = s.substring(s.length - 3, s.length - 2);
    return hex2rgba(`${r + r}${g + g}${b + b}`);
  }
  if (/^#?[0-9a-fA-F]{4}$/.test(s)) {
    let a = s.substring(s.length - 1, s.length);
    let b = s.substring(s.length - 2, s.length - 1);
    let g = s.substring(s.length - 3, s.length - 2);
    let r = s.substring(s.length - 4, s.length - 3);
    return hex2rgba(`${r + r}${g + g}${b + b}${a + a}`);
  }
  if (/^#?[0-9a-fA-F]{6}$/.test(s)) {
    let b = parseInt('0x' + s.substring(s.length - 2, s.length));
    let g = parseInt('0x' + s.substring(s.length - 4, s.length - 2));
    let r = parseInt('0x' + s.substring(s.length - 6, s.length - 4));
    return { r, g, b, a: 1 };
  }
  if (/^#?[0-9a-fA-F]{8}$/.test(s)) {
    let a = parseInt('0x' + s.substring(s.length - 2, s.length));
    a = a / 255;
    let b = parseInt('0x' + s.substring(s.length - 4, s.length - 2));
    let g = parseInt('0x' + s.substring(s.length - 6, s.length - 4));
    let r = parseInt('0x' + s.substring(s.length - 8, s.length - 6));
    return { r, g, b, a };
  }
};
/**
 * 解析输入的数据,只能解析hex颜色和rgb对象形式的数据
 * @param color
 */
const parseColor = (color: Color | string) => {
  if (color) {
    let r, g, b, a;
    if (typeof color === 'string') {
      if (/^#?([0-9a-fA-F]{6}|[0-9a-fA-F]{8}|[0-9a-fA-F]{3}|[0-9a-fA-F]{4})$/.test(color)) {
        return hex2rgba(color);
      }
    } else {
      r = color.r > 255 ? 255 : color.r < 0 ? 0 : color.r;
      g = color.g > 255 ? 255 : color.g < 0 ? 0 : color.g;
      b = color.b > 255 ? 255 : color.b < 0 ? 0 : color.b;
      a = color.a > 1 ? 1 : color.a < 0 ? 0 : color.a;
      return { r, g, b, a };
    }
  } else {
    return null;
  }
};

// 输入框值变化,限制输入的值
const hexChange = (e: Event) => {
  let v = (e.target as HTMLInputElement).value;
  if (/^#?([0-9a-fA-F]{6}|[0-9a-fA-F]{8})$/.test(v)) {
    let { r, g, b, a } = hex2rgba(v);
    red.value = r;
    green.value = g;
    blue.value = b;
    alpha.value = a;
  }
};

const greenChange = (e: any) => {
  let v = e.target.value;
  if (v !== '') {
    v > 255 && (green.value = 255);
    v < 0 && (green.value = 0);
    v >= 0 && v <= 255 && (green.value = parseInt(v));
  }
};

const blueChange = (e: any) => {
  let v = e.target.value;
  if (v !== '') {
    v > 255 && (blue.value = 255);
    v < 0 && (blue.value = 0);
    v >= 0 && v <= 255 && (blue.value = parseInt(v));
  }
};

const alphaChange = (e: any) => {
  let v = e.target.value;
  if (v !== '') {
    v = parseFloat(v);
    alpha.value = v;
    v > 1 && (alpha.value = 1);
    v < 0 && (alpha.value = 0);
    v >= 0 && v <= 1 && (alpha.value = v);
  }
};

const redChange = (e: any) => {
  let v = e.target.value;
  if (v !== '') {
    v > 255 && (red.value = 255);
    v < 0 && (red.value = 0);
    v >= 0 && v <= 255 && (red.value = parseInt(v));
  }
};

// 点击预设方块事件
const presetChange = (item: any) => {
  if (/^#?([0-9a-fA-F]{6}|[0-9a-fA-F]{8})$/.test(item)) {
    let { r, g, b, a } = hex2rgba(item);
    red.value = r;
    green.value = g;
    blue.value = b;
    alpha.value = a;
  }
};

// 饱和度和亮度
const handleChangeSV = (e: any) => {
  let w = saturation_valueRef.value.clientWidth;
  let h = saturation_valueRef.value.clientHeight;
  let x = e.clientX - saturation_valueRef.value.getBoundingClientRect().left;
  let y = e.clientY - saturation_valueRef.value.getBoundingClientRect().top;
  x = x < w && x > 0 ? x : x > w ? w : 0;
  y = y < h && y > 0 ? y : y > h ? h : 0;
  // 计算饱和度和亮度
  saturation.value = Math.floor((x / w) * 100 + 0.5) / 100;
  value.value = Math.floor((1 - y / h) * 100 + 0.5) / 100;
  // hsv转化为rgb
  let { r, g, b } = hsv2rgb(hue.value, saturation.value, value.value);
  red.value = r;
  green.value = g;
  blue.value = b;
  // 移动背景板圆圈
  pointStyle.value = `top: ${y}px;left: ${x}px;`;
};

const mousedownSV = (e: any) => {
  // 鼠标按下计算饱和度和亮度并添加事件
  handleChangeSV(e);
  // 添加整个页面的鼠标事件
  window.addEventListener('mousemove', handleChangeSV);
  window.addEventListener('mouseup', mouseupSV);
};

const mouseupSV = (e: any) => {
  // 鼠标松开后移除事件
  window.removeEventListener('mousemove', handleChangeSV);
  window.removeEventListener('mouseup', mouseupSV);
};

// 色调
const handleChangeHue = (e: any) => {
  let w = hue_sliderRef.value.clientWidth;
  let x = e.pageX - saturation_valueRef.value.getBoundingClientRect().left;
  x = x < w && x > 0 ? x : x > w ? w : 0;
  // 计算色调
  hue.value = Math.floor((x / w) * 360 + 0.5);
  // hsv转化为rgb
  let { r, g, b } = hsv2rgb(hue.value, saturation.value, value.value);
  red.value = r;
  green.value = g;
  blue.value = b;
  // 移动滑块
  hueSliderStyle.value = `left: ${x >= w - 6 ? w - 6 : x}px;`;
};

const mousedownHue = (e: any) => {
  handleChangeHue(e);
  window.addEventListener('mousemove', handleChangeHue);
  window.addEventListener('mouseup', mouseupHue);
};

const mouseupHue = (e: any) => {
  window.removeEventListener('mousemove', handleChangeHue);
  window.removeEventListener('mouseup', mouseupHue);
};

// 透明度
const handleChangeAlpha = (e: any) => {
  let w = alpha_sliderRef.value.clientWidth;
  let x = e.pageX - saturation_valueRef.value.getBoundingClientRect().left;
  x = x < w && x > 0 ? x : x > w ? w : 0;
  // 计算透明度
  alpha.value = Math.floor((x / w) * 100 + 0.5) / 100;
  // 移动滑块
  alphaSliderStyle.value = `left: ${x >= w - 6 ? w - 6 : x}px;`;
};

const mousedownAlpha = (e: any) => {
  handleChangeAlpha(e);
  window.addEventListener('mousemove', handleChangeAlpha);
  window.addEventListener('mouseup', mouseupAlpha);
};

const mouseupAlpha = (e: any) => {
  window.removeEventListener('mousemove', handleChangeAlpha);
  window.removeEventListener('mouseup', mouseupAlpha);
};

const hsv2rgb = (h: any, s: any, v: any) => {
  h === 360 && (h = 0);
  let i = Math.floor(h / 60) % 6;
  let f = h / 60 - i;
  let p = v * (1 - s);
  let q = v * (1 - s * f);
  let t = v * (1 - s * (1 - f));
  let r, g, b;
  if (i === 0) {
    r = v;
    g = t;
    b = p;
  } else if (i === 1) {
    r = q;
    g = v;
    b = p;
  } else if (i === 2) {
    r = p;
    g = v;
    b = t;
  } else if (i === 3) {
    r = p;
    g = q;
    b = v;
  } else if (i === 4) {
    r = t;
    g = p;
    b = v;
  } else if (i === 5) {
    r = v;
    g = p;
    b = q;
  }
  r = Math.floor(r * 255 + 0.5);
  g = Math.floor(g * 255 + 0.5);
  b = Math.floor(b * 255 + 0.5);
  return { r, g, b };
};

const rgb2hsv = (r: any, g: any, b: any) => {
  let r1 = r / 255;
  let g1 = g / 255;
  let b1 = b / 255;
  let cmax = Math.max(r1, g1, b1);
  let cmin = Math.min(r1, g1, b1);
  let d = cmax - cmin;
  let h = 0;
  let s, v;
  if (d === 0) {
    h = 0;
  } else if (cmax === r1) {
    h = ((60 * (g1 - b1)) / d + 360) % 360;
  } else if (cmax === g1) {
    h = 60 * ((b1 - r1) / d + 2);
  } else if (cmax === b1) {
    h = 60 * ((r1 - g1) / d + 4);
  }
  if (cmax === 0) {
    s = 0;
  } else {
    s = d / cmax;
  }
  v = cmax;
  h = Math.floor(h + 0.5);
  s = Math.floor(s * 100 + 0.5) / 100;
  v = Math.floor(v * 100 + 0.5) / 100;
  return { h, s, v };
};

const toggleOpen = () => {};
const clickOutsideHandle = () => {};

onMounted(() => {
  let { r, g, b, a } = parseColor(props.color);
  red.value = r;
  green.value = g;
  blue.value = b;
  alpha.value = a;
});
</script>
